maths question 一題 <15marks>
回答 (4)
2008-05-15 10:37 pm
✔ 最佳答案
很無棱兩可的問題...可以有兩種答案:
若下午用去的十分之三元是未計上午用去 十分之三,那共用了:
= $250 x (3/10) + $250 x (3/10)
= $75 + $75
= $150
若下午用去的十分之三元是已經計上午用去 十分之三,那共用了:
= $250 x (3/10) + {$250 - [$250 x (3/10)]} x (3/10)
= $75 + ($250 -$75) x (3/10)
= $75 + $175 x (3/10)
= $75 + $52.5
= $127.5
2008-05-12 6:02 pm
共用了:
250x(3/10+3/10)=150(元)
250x(3/10+3/10)=150(元)
2008-05-12 1:24 am
250x(3/10+3/10)
=250x6/10
=150元
=250x6/10
=150元
收錄日期: 2021-04-29 20:25:36
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080511000051KK01860